202138618873 has 2 divisors, whose sum is σ = 202138618874. Its totient is φ = 202138618872.

The previous prime is 202138618853. The next prime is 202138618919. The reversal of 202138618873 is 378816831202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196388126649 + 5750492224 = 443157^2 + 75832^2 .

It is a cyclic number.

It is not a de Polignac number, because 202138618873 - 2⁹ = 202138618361 is a prime.

It is not a weakly prime, because it can be changed into another prime (202138618853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101069309436 + 101069309437.

It is an arithmetic number, because the mean of its divisors is an integer number (101069309437).

Almost surely, 2^202138618873 is an apocalyptic number.

It is an amenable number.

202138618873 is a deficient number, since it is larger than the sum of its proper divisors (1).

202138618873 is an equidigital number, since it uses as much as digits as its factorization.

202138618873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 49.

The spelling of 202138618873 in words is "two hundred two billion, one hundred thirty-eight million, six hundred eighteen thousand, eight hundred seventy-three".